docs: def show_pageitems(_, token):
      """Show page items.
  
      Usage:
  
      .. code-block:: html+django
  
          {% show_pageitems per_page %}
  
      """
      # Validate args.
      if len(token.contents.split()) != 1:
          msg = '%r tag takes no arguments' % token.contents.split()[0]
          raise template.TemplateSyntaxError(msg)
      # Call the node.
      return ShowPageItemsNode()